====== LCD brightness adjustment ======
Open the Grub configuration file:
<code>
sudo vim /etc/default/grub
</code>

Modify the line:
<code>
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"
</code>

See: [[https://bugs.launchpad.net/ubuntu/+source/linux/+bug/512567|Ubuntu Bug #512567]]